Method getNextFrame

packages/2d/src/lib/utils/video/parser/parser.ts:124–207

()

  }

  public async getNextFrame() {
    // Start the first segment
    if (!this.sampler) {
      // Skip segments until the start time
      let startTimeWithinSegment = this.startTime;
      while (this.nextSegment < this.edits.length) {
        const segmentDurationInSeconds = this.getSecondDurationOfSegment(
          this.edits[this.nextSegment],
        );
        if (startTimeWithinSegment < segmentDurationInSeconds) {
          break;
        }

        startTimeWithinSegment -= segmentDurationInSeconds;
        this.nextSegment++;
      }

      // The timestamp is outside of the video
      if (this.nextSegment >= this.edits.length) {
        throw new Error(
          `Timestamp ${this.startTime} is outside of the video, max timestamp is ${this.getDuration()}`,
        );
      }

      const segment = new Segment(
        this.uri,
        this.file,
        this.edits,
        this.nextSegment,
        startTimeWithinSegment,
      );
      await segment.start(this.decoderConfig!);

      this.sampler = new FrameSampler(
        segment,
        this.edits[this.nextSegment].fps,
        this.targetFps,
        0,
      );
      this.nextSegment++;
    }

    // Try to get the next frame
    let frame = await this.sampler.getNextFrame();

    // If there are no more frames in the current segment, start the next segment
    while (!frame && this.nextSegment < this.edits.length) {
      this.sampler.getSegment().close();
      this.sampler.getLastFrame()?.close();
      const segment = new Segment(
        this.uri,
        this.file,
        this.edits,
        this.nextSegment,
        0,
      );
      await segment.start(this.decoderConfig!);